Let's learn the secrets of stationery! : Hitachi High-Tech Science Outreach Program : Hitachi High-Tech Corporation

Oh dear, that's not right.

I rubbed really hard, but it didn't disappear at all!
All it did was crumple the paper.

The ink from a ballpoint pen absorbs into the paper,
so it doesn't rub out with a regular eraser.

HintTo remove ink, you need to scrape off the surface of the paper as well.

Correct!

Sand erasers are specially made to remove ballpoint pens and printed text.
They contain a fine abrasive called silica sand that removes text along with the surface of the paper. If you rub too hard, you'll tear the paper, so take it slow and rub gently.

Oh dear, that's not right.

Huh?! That didn't work, and it got the page all dirty!

are not well suited to dark pencil sketches, as they struggle to pick up
all of the graphite sheets and may leave black stains on the paper.

Correct!

Kneaded erasers are soft and sticky,
so they can easily remove dark pencil lines, make them lighter,
or erase fine details with minimal pressure.
They also don't leave eraser dust, so they're great for sketches.

Which eraser can remove ballpoint pen writing?

Oh dear, that's not right.

Correct!

Which eraser can effectively rub out sketches drawn
with a dark pencil?

Oh dear, that's not right.

Correct!

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